Relationship between number of core adverse prognostic features, age ⩾65 years, and risk of mortality
| Derivation cohort (n=718) | Validation cohort (n=214) | ||||
|---|---|---|---|---|---|
| Features | No. present | Total | Died (%) | Total | Died (%) |
| CURB = Confusion, Urea >7 mmol/l, Respiratory rate ⩾30/min, low Blood pressure (systolic <90 mm Hg or diastolic ⩽60 mm Hg). | |||||
| CRB-65 does not include urea and uses only clinical parameters available for patient assessment in the community. | |||||
| CURB | 0 | 217 | 3 (1.4) | 55 | 0 |
| 1 | 247 | 14 (5.4) | 86 | 5 (5.8) | |
| 2 | 162 | 23 (14.2) | 46 | 8 (17.4) | |
| 3 | 85 | 28 (32.9) | 23 | 6 (26) | |
| 4 | 7 | 1 (14.3) | 4 | 1 (25) | |
| CURB-65 | 0 | 137 | 1 (0.7) | 36 | 0 |
| 1 | 187 | 4 (2.1) | 54 | 0 | |
| 2 | 184 | 17 (9.2) | 60 | 5 (8.3) | |
| 3 | 138 | 20 (14.5) | 42 | 9 (21.4) | |
| 4 | 65 | 26 (40) | 19 | 5 (26.3) | |
| 5 | 7 | 1 (14) | 3 | 1 (33.3) | |
| CRB-65 | 0 | 167 | 2 (1.2) | 45 | 0 |
| 1 | 266 | 14 (5.3) | 78 | 4 (5.1) | |
| 2 | 189 | 23 (12.2) | 62 | 7 (11.3) | |
| 3 | 85 | 28 (32.9) | 26 | 8 (30.8) | |
| 4 | 11 | 2 (18.2) | 3 | 1 (33.3) | |